Tube-number record
837
0 archive entries
837 is a tube type in the TubeDatabase archive (class: R-F Power Amplifier Pentode). Recorded specifications: brand RCA, year 1939, construction Pentode, base Ceramic, socket 7-pin (non-miniature), maximum plate voltage 500 V, and maximum plate dissipation 12 W. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassR-F Power Amplifier Pentode
Base7-pin (non-miniature)
Filament12.6 V @ 700 mA
Construction
Primary TypePentode
EnvelopeST-16
Base MaterialCeramic
Sections1
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B Telephony | 500 V | 3400 | — | — | 30 mA |
| Class C Telegraphy - Pentode Connection | 500 V | — | — | — | 60 mA |
Application Notes
The internal shielding in this tube is unusually effective; it generally is necessary to introduce external feedback in those circuits which depend on the control-grid-to-plate capacity for oscillation.
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